Boosting pseudocapacitive charge storage in in situ functionalized carbons with a high surface area for high-energy asymmetric supercapacitors

Abstract

The porosity and heteroatom doping level can be tuned for jellyfish-derived carbons to adjust capacitive and pseudocapacitive contributions.

Dual-doped hierarchical porous carbon derived from biomass for advanced supercapacitors and lithium ion batteries

“…1b-d), it can be discovered that abundant micro/meso pores randomly oriented on the surface of the NLDPCs, which can not only increase the accessible electrode/ electrolytes interface, but also shorten the ion transport length with a minimized high-rate diffusional loss. 24,42 In addition, the high-resolution TEM micrographs were demonstrated in the inserts of Fig. 1b-d, which indicate the highly Scheme 1 Illustration of the preparation of the nettle leaf derived porous carbons.…”

“…S2 †). 24,46 As shown in Table S1, † the value of I D /I G is 2.54 for NLDPC-700-4-2, 2.32 for NLDPC-800-4-2 and 2.10 for NLDPC-900-4-2. Moreover, the NLDPCs have a narrower FWHM of D-mode with the increase of the activation temperature, from 136 cm À1 for NLDPC-700-4-2 to 126 cm À1 for NLDPC-800-4-2 and 119 cm À1 for NLDPC-900-4-2, and a narrower FWHM of G-mode from 76 cm À1 for NLDPC-700-4-2 to 74 cm À1 for NLDPC-800-4-2 and 73 cm À1 for NLDPC-900-4-2.…”

“…[20][21][22] Compared with single heteroatom doping, co-doping can further enhance electrochemical properties of the carbon materials owing to the synergistic effect. [23][24][25][26][27] For example, nitrogen and oxygen have received considerable attention for improving the wettability between electrolyte and electrode material and facilitating the occurrence of surface redox reaction further to achieve extra pseudocapacitance. 13,24 As a kind of natural resource, biomass has been considered as potential precursor for the preparation of carbon materials owing to its easily available, fast-renewable, low-cost and environmentally benign features.…”

“…[23][24][25][26][27] For example, nitrogen and oxygen have received considerable attention for improving the wettability between electrolyte and electrode material and facilitating the occurrence of surface redox reaction further to achieve extra pseudocapacitance. 13,24 As a kind of natural resource, biomass has been considered as potential precursor for the preparation of carbon materials owing to its easily available, fast-renewable, low-cost and environmentally benign features. 26,[28][29][30] Consequently, carbon materials derived from biomass (including hemp, 8 cattle bone, 12 ginkgo leaves, 31 honeysuckle, 23 wheat stalk, 32 bamboo pulps, 33 peat moss, 34 and rice husk, 35 and cotton 36 ) by pyrolysis/ activation process as electrodes for SCs and LIBs have been explored.…”

Varying the Hydrogen Bonding Strength in Phenolic/PEO‐b‐PLA Blends Provides Mesoporous Carbons Having Large Accessible Pores Suitable for Energy Storage

“…[ 38 ] We investigated these activated mesoporous carbons for their ability to boost the efficiencies of electrochemical energy storage. [ 39,40 ] We measured their performance in a three‐electrode cell using 6.0 m KOH as a basic electrolyte; these conditions provided a green medium having a wide potential range for cyclic voltammetry (CV), from −0.9 to −0.1 V, for all the activated mesoporous carbons ( Figure ). [ 41 ] All of the activated mesoporous carbons derived from the various PEO‐ b ‐PLA ratios provided similar EDLC curves within the investigated range, suggesting uniform carbon structures after activation at all of the ratios.…”